高速铁路接触网结冰生长特性预测模型

IF 3.8 2区 工程技术 Q1 ENGINEERING, CIVIL Cold Regions Science and Technology Pub Date : 2024-08-30 DOI:10.1016/j.coldregions.2024.104306
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引用次数: 0

摘要

滑动电接点是高速列车获取能量的唯一途径。当接触网线路结冰时,受电弓-接触网系统的冲击振动进一步加剧,电弧产生更加频繁,造成非正常磨损,严重威胁高速铁路的能源供应安全。针对接触线结冰机理不清、规律难测、表征困难等问题,本文首次提出了一种动态模拟方法。此外,还利用深度学习算法开发了一种预测接触线结冰的代用模型。首先,基于网格更新、流场分析和结冰计算,得到关键结冰参数,建立了时变气象参数下接触网结冰的数值模型。然后,分析了风速、温度和液态水含量等因素对接触线结冰动态演变特征的影响。最后,利用 CNN-GRU 算法构建了接触线结冰预测模型,对结冰质量和轮廓进行了预测。该研究阐明了接触线结冰的演变规律,解决了监测和预测结冰状态的难题,为高速铁路在结冰条件下的安全稳定运行奠定了理论基础。
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Prediction model for icing growth characteristics of high-speed railway contact lines

The sliding electrical contact is the only means by which high-speed trains obtain energy. When icing occurs on the contact lines, the impact vibrations of the pantograph-catenary system are further exacerbated, electrical arcing becomes more frequent, and abnormal wear is caused, seriously threatening the safety of the energy supply for high-speed railways. To address the unclear mechanisms, unpredictable patterns, and challenging characterization of contact lines icing, this paper proposes a dynamic simulation method for the first time. Furthermore, a surrogate model for predicting contact line icing is developed using deep learning algorithms. First, based on grid updating, flow field analysis, and icing calculations, key icing parameters are obtained to establish a numerical model of contact lines icing under time-varying meteorological parameters. Then, the effects of factors such as wind speed, temperature, and liquid water content on the dynamic evolution characteristics of contact line icing are analyzed. Finally, using the CNN-GRU algorithm, a prediction model for contact line icing is constructed to predict the icing mass and contours. This research clarifies the evolution patterns of contact lines icing, addresses challenges in monitoring and predicting icing states, and lays a theoretical foundation for high-speed railways' safe and stable operation under icing conditions.

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来源期刊
Cold Regions Science and Technology
Cold Regions Science and Technology 工程技术-地球科学综合
CiteScore
7.40
自引率
12.20%
发文量
209
审稿时长
4.9 months
期刊介绍: Cold Regions Science and Technology is an international journal dealing with the science and technical problems of cold environments in both the polar regions and more temperate locations. It includes fundamental aspects of cryospheric sciences which have applications for cold regions problems as well as engineering topics which relate to the cryosphere. Emphasis is given to applied science with broad coverage of the physical and mechanical aspects of ice (including glaciers and sea ice), snow and snow avalanches, ice-water systems, ice-bonded soils and permafrost. Relevant aspects of Earth science, materials science, offshore and river ice engineering are also of primary interest. These include icing of ships and structures as well as trafficability in cold environments. Technological advances for cold regions in research, development, and engineering practice are relevant to the journal. Theoretical papers must include a detailed discussion of the potential application of the theory to address cold regions problems. The journal serves a wide range of specialists, providing a medium for interdisciplinary communication and a convenient source of reference.
期刊最新文献
Editorial Board Prototype observation and analysis of static ice pressure on reservoir piers in cold regions Relationship of physical and mechanical properties of sea ice during the freeze-up season in Nansen Basin New insights into icephobic material assessment: Introducing the human motion–inspired automated apparatus (HMA) Mesoscopic shear evolution characteristics of frozen soil-concrete interface
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